Insulator



Nov. 29, 1927.. 15651201 M. F. H. GOUVERNZEUR INSULATOR Filed April 7, 1921 Patented Nov. 2.9, 1927.

lll'llill) STATES Partnr orales- MINOR F. EL'. GOUVERNEUR, OF VCTOR, NEW YORK, ASSIGNOR T0 LOCKE INSULATOR CORPORAT'ON, OF BALTEMGEE, MARYLAND, fr CGRPORATN (3F VIRYLAND.

NSULATOR.

Application led April 7,

The invention relatesto insulators for high tension power transmission, and more particularly to the general class of suspension or strain insulators. The principal object of my inif'ention, broadly stated, is to improve the construction of insulators of the suspension or strain type in such manner that the electricl and mechanical efliciency of the dielectric body portion of the insulator greatly increased.

To this end provide an insulating body portion of dielectric material having spaced interlinking passages therein, the said body portion being so constructed that the thickness of tue dielectric material adjacent the passages is substantially constant at all points.

Another object of the invention is to provide a simple and easily manufactured form of disk insulator' in which the interlinking passages thereof are located so that th-e leasA distance between the conductors of opposite potential extending through the said passages is equal to the distance between surfaces of opposite potential throughout the portion of the insulating or dielectric body in the neighborhood of the passages.

Aanother object of the invention is to provide an insulator of dielectric material with substantially semicircular interlinking paspages therein and to construct the insulator so that the mechanicalstrain is transmitted to the body of material as a direct compression without unequal distribution of the electrical stresses over the surfaces of oppo site potential.

A primary feature of my invention consists in providing the opposite faces of an insulator body with projections whose surfaces are surfaces of revolution (or substan- `tially so) generated by rotating a curved line, preferably an arc of circle7 about an axis which extends parallel to the plane of said arc and which lies without the circle of said arc or gcneratriX. The said projections therefore are of toroidal form, being segments of a torus.

Another principal feature of the invention resides in forming the body of dielec tric material with interlinked passages, and with a plurality of elongated projections disposed upon opposite sides of said body parallel with the respective passages and crossing each other.`

There are other features of invention as will hereinafter more fully appear from Figure 3 is also a transverse vertical secl tional View of the insulator, the section being taken on the plane of the line 3-3 of Fig. l.

rlhroughout the specification and drawings like parts are designated by like reference characters. A

rlhe insulator preferably comprises adiskshaped dielectric body portion l, which is conveniently provided adjacent its peripheral edge 2 and on the lower face 3 thereof with a downwardly extending skirt or flange portion et. lf desired the outer face of the flange t may be formed with a circumferential groove or undercut portion 5 the pur-` pose of which is to reduce the thickness of the insulator adjacent its edge and to increase the flash-over distance between terminals of opposite potentials.

The upper face 6 of the disk l is furnished with a toroidal projection 7 and a correspondingly shaped projection 8 is also formed upon the lower face 3 of the disk. The projections 7 and 8 are substantially elliptical in plan and are preferably arranged, in the type of insulator here illustrated, centrally of the disk l with their major axes crossing each other at an angle.

Passing lengthwise through the projections 7 and 8 are curved passages or channels 9 and Vl0, respectively, the said channels being adapted to receive the supporting members orinetallic elements by which thev insulators are connected to the supports, or to companion insulators, or to the conduc tor. The said passages 9 and l0 interlink within the body of the insulator and are separated. by intervening dielectric material where they cross or intersect.

The passage 10 preferably follows the arc of circle whose center of curvature lies in the locus of the center of symmetry of the generatrix of the toroidal projection 7, and whose radial distance from said center of lll) synnnetry is equa to the radius et' the said generatrix. The passage S) and the toroidal projection 8 are similarly related, the passages 9 l l() thus kfollowing the loci or paths ot lie respective 'centers'ot synnnet'ry of the generati-ieee et "the corresponding projections 7 and 8. By this coiistruction the ends oit the respective passages 9 and l0 which open to the opposite i'aces 3 anfl 5 oit the insulator, nierge with or are tangent to the sides of their respective projections, and said passages extend in curvesrespectively concentric with tlie surfaces ot the corresponding projections.

The cross sectional dimensions of the passages l9 and l() are sucli that the thickness oithe walls by which the said passages are surroundedis equal to that et the neighboringparts of the' disk. The dielectric thickness between surliaces oiopposite potential is thus rendered constant and localisation or concentration oi electrical stress rdon y a line'betyveen the conductors or terni@ `ils is tliere'lore obviated. This eliects i consider'- able increase in the puncture value oi` the stilator. `Not onlyI is the electrical eliiciency of the insulator increased by the avoidance olil adjacent thick and thin sections ot the dielectric niateriah but an insulator enibnljp ing niyinvention is simpler and cheaper to manufacture, since the absence ot thick sec tions'ot the 'insulator body adjacent thinner sections obviates'the tendency, during dry! ing, toproduce cracks or other iinperljections at the junctures of sections ot unequal thickness. v j

'llhe'insulator may, it desired, be cast with the passages 9 and l0, therein, but it is pret'erred to nild or pug insulators. l/vjl'lien inade b v the molding process the passages, 9 and l() lor theconductors are out or torined in"theinsul ator body when the saine isn a plastic state, these passagesbeing preferably produced in the manner described in rn'y copending` application, Serial No. 384.3853, iled May 2li: i920. lily forming the passages 9 and l() inl t insulator lprior to its il@ hardening all substantial inequalities in thicknessare reinoved, and consequently the liability to produce cracks or siniilar imper-` fections in the insulator is minimized. The in ator may, tliere'lforabe njiolded ifroin ay dei .e Iporcelain n'iix. whereas cast or alloiyed tofdry prior to lorn'iilnm tbe passages 9 and l() therein an open and porous'percelain )nix would be required." Having noiv described my'invention, I claim and desire to secure by 'Letters ent is l. An insulatorr provided on its opposite `faces with 'toroidal projections7 and previded with al pair of'interlinking circular pasliaving their respective openings in. the oppositefaces ot said insulator'. the said openings being substantially tangent to the adjacent portions yol the respective projections.`

2. An insulator comprising a disk ol" dielectric inaterial having inter-linking circular passages therein. the open ends oit the respective passages being disposed on opposite 'laces el said disk, and projections on the opposite sides ot said disk each of which entends between the open ends ot' one ol the said passages.

3. An insulator con'iprising a disk olf dielectric material each tace of which is perforated by openings leading to a separate circular passage, said passages being .interlinked in the body ot said disk, and the dielectric thickness ot said disk at all points adjacent said passages being substantiallj1 constant.

Ll. An insulator comprising a disk ol dielectric material having on its opposite faces toroidal projections, and provided with curved interiinked passages entering said disk troni tbe opposite tacos lhereoit7 the ends of the respective passages being substantialljY tangent to the adjacent projections, whereby the dielectric thiclniessl et said disk at all` points adjacent the said projections is substantially constant.

An insulator' coniprising a bodjv portion oi? diei Actric material. provided with interlinked passages and with a plurality ot projections disposed upon opposite sides et said' body and crossing each other.

An insulator coniprisiijig a body portion et dielectric material provided with in* terlinked passages and witha plurality ot' elofi'ated projections upon opposite sides et said body, 'each ot Vsaid projections being disposed vfitli its'inajolr dimension lying in the plane oi" a corresponding one ot said pas sages. l

7.' IAn insulator coinprising a. disk ot dielectric material having a curved passage opening yat itsends on one side oit said disk, and provided on its opposite sideV with a projection Whose exterior is a surface et revolution. the generatrix ol said sunt'ace ol revolutionbeinga circular curve the locus ot Whose centerof curvatureis in said pas sage7 and the axis ot revolution of said sur face passing through the center ol curvature ot saidpassage. Y

8. An 'insulator' having a body portion ol' dielectric material'provided with :i plural ity oi passages and with a plurality of pro jections respectively corresponding to said passages, the line olf intersection ot the surtaceol each off said projections with the plane o l` the corresponding p' age being parallel to said last named par-.sage and the intersection saic surface with planet-1, normal to said last named passage being spaced equally troni said last named passage.

in testimony whereof l atli( iny `nain MINOR F. H. GoUvnRN'nUileu lei;

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